A MMSE Channel Estimator Based on Adaptive Order Determination in OFDM Systems
OFDM系统基于自适应定阶的MMSE信道估计

MMSE estimator is a common channel estimator in coherent OFDM systems. Against mismatch problem of MMSE estimator, an improved MMSE channel estimator based on adaptive order determination is proposed. This algorithm estimates the maximum multipath delay, and calculates the channel autocorrelation function adaptively, it is shown that the proposed method performance is close to the optimal matched MMSE estimator.